ESAB Multimaster 300/300X Mig/Tig/Stick Welding Package User manual

Multimaster 300/300X

MIG/TIG/STICK WELDING PACKAGE

0558007770 06/2010

Instruction Manual

2

This equipment will perform in conformity with the description thereof contained in this manual and accompa-

nying labels and/or inserts when installed, operated, maintained and repaired in accordance with the instruc-

tions provided. This equipment must be checked periodically. Malfunctioning or poorly maintained equipment

should not be used. Parts that are broken, missing, worn, distorted or contaminated should be replaced imme-

diately. Should such repair or replacement become necessary, the manufacturer recommends that a telephone

or written request for service advice be made to the Authorized Distributor from whom it was purchased.

This equipment or any of its parts should not be altered without the prior written approval of the manufacturer.

The user of this equipment shall have the sole responsibility for any malfunction which results from improper

use, faulty maintenance, damage, improper repair or alteration by anyone other than the manufacturer or a ser-

vice facility designated by the manufacturer.

BE SURE THIS INFORMATION REACHES THE OPERATOR.

YOU CAN GET EXTRA COPIES THROUGH YOUR SUPPLIER.

These INSTRUCTIONS are for experienced operators. If you are not fully familiar with the

principles of operation and safe practices for arc welding and cutting equipment, we urge

you to read our booklet, “Precautions and Safe Practices for Arc Welding, Cutting, and

Gouging,” Form 52-529. Do NOT permit untrained persons to install, operate, or maintain

this equipment. Do NOT attempt to install or operate this equipment until you have read

and fully understand these instructions. If you do not fully understand these instructions,

contact your supplier for further information. Be sure to read the Safety Precautions be-

fore installing or operating this equipment.

CAUTION

USER RESPONSIBILITY

READ AND UNDERSTAND THE INSTRUCTION MANUAL BEFORE INSTALLING OR OPERATING.

PROTECT YOURSELF AND OTHERS!

3

TABLE OF CONTENTS

Section / Title Page

1.0 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

1.1 Safety - English . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

1.2 Safety - Spanish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

1.3 Safety - French . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

2.0 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

2.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.2 Receiving - Handling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.3 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.4 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3.0 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.1 Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.2 Handle Assembly Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.3 Electrical Input Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

3.4 Voltage Changeover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

3.5 Secondary Output Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.6 “NAS” Torch Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

3.7 Wire Feeder Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

3.8 Connection of Shielding Gas Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

4.0 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4.1 Standard Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4.2 Optional Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

4.3 Mig Welding Set-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

4.4 Tig Welding Set-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

4.5 Stick Welding Set-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

4.6 Handling the Tig Torch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

5.0 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

5.1 Maintenance and Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

5.2 Inspection and Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

6.0 Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

6.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

6.2 Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

ENGLISH .............................................................................................................................................. 1

FRENCH-CANADIAN ..........................................................................................................................37

4

TABLE OF CONTENTS

5

SECTION 1 SAFETY PRECAUTIONS

1.0 Safety Precautions

1.1 Safety - English

WARNING: These Safety Precautions are

for your protection. They summarize pre-

cautionary information from the references

listed in Additional Safety Information sec-

tion. Before performing any installation or operating

procedures, be sure to read and follow the safety precau-

tions listed below as well as all other manuals, material

safety data sheets, labels, etc. Failure to observe Safety

Precautions can result in injury or death.

PROTECT YOURSELF AND OTHERS --

Some welding, cutting, and gouging

processes are noisy and require ear

protection. The arc, like the sun, emits

ultraviolet (UV) and other radiation

and can injure skin and eyes. Hot metal can cause

burns. Training in the proper use of the processes

and equipment is essential to prevent accidents.

Therefore:

1. Always wear safety glasses with side shields in any

work area, even if welding helmets, face shields, and

goggles are also required.

2. Use a face shield tted with the correct lter and

cover plates to protect your eyes, face, neck, and

ears from sparks and rays of the arc when operating

or observing operations. Warn bystanders not to

watch the arc and not to expose themselves to the

rays of the electric-arc or hot metal.

3. Wear ameproof gauntlet type gloves, heavy long-

sleeve shirt, cuess trousers, high-topped shoes,

and a welding helmet or cap for hair protection, to

protect against arc rays and hot sparks or hot metal.

A ameproof apron may also be desirable as protec-

tion against radiated heat and sparks.

4. Hot sparks or metal can lodge in rolled up sleeves,

trouser cus, or pockets. Sleeves and collars should

be kept buttoned, and open pockets eliminated from

the front of clothing.

5. Protect other personnel from arc rays and hot

sparks with a suitable non-ammable partition or

curtains.

6. Use goggles over safety glasses when chipping slag

or grinding. Chipped slag may be hot and can y far.

Bystanders should also wear goggles over safety

glasses.

FIRES AND EXPLOSIONS -- Heat from

ames and arcs can start res. Hot

slag or sparks can also cause res and

explosions. Therefore:

1. Remove all combustible materials well away from

the work area or cover the materials with a protec-

tive non-ammable covering. Combustible materials

include wood, cloth, sawdust, liquid and gas fuels,

solvents, paints and coatings, paper, etc.

2. Hot sparks or hot metal can fall through cracks or

crevices in oors or wall openings and cause a hid-

den smoldering re or res on the oor below. Make

certain that such openings are protected from hot

sparks and metal.“

3. Do not weld, cut or perform other hot work until the

workpiece has been completely cleaned so that there

are no substances on the workpiece which might

produce ammable or toxic vapors. Do not do hot

work on closed containers. They may explode.

4. Have re extinguishing equipment handy for instant

use, such as a garden hose, water pail, sand bucket,

or portable re extinguisher. Be sure you are trained

in its use.

5. Do not use equipment beyond its ratings. For ex-

ample, overloaded welding cable can overheat and

create a re hazard.

6. After completing operations, inspect the work area

to make certain there are no hot sparks or hot metal

which could cause a later re. Use re watchers when

necessary.

7. For additional information, refer to NFPA Standard

51B, "Fire Prevention in Use of Cutting and Welding

Processes", available from the National Fire Protec-

tion Association, Batterymarch Park, Quincy, MA

02269.

ELECTRICAL SHOCK -- Contact with

live electrical parts and ground can

cause severe injury or death. DO NOT

use AC welding current in damp areas,

if movement is conned, or if there is

danger of falling.

6

SECTION 1 SAFETY PRECAUTIONS

1. Be sure the power source frame (chassis) is con-

nected to the ground system of the input power.

2. Connect the workpiece to a good electrical

ground.

3. Connect the work cable to the workpiece. A poor

or missing connection can expose you or others

to a fatal shock.

4. Use well-maintained equipment. Replace worn or

damaged cables.

5. Keep everything dry, including clothing, work

area, cables, torch/electrode holder, and power

source.

6. Make sure that all parts of your body are insulated

from work and from ground.

7. Do not stand directly on metal or the earth while

working in tight quarters or a damp area; stand

on dry boards or an insulating platform and wear

rubber-soled shoes.

8. Put on dry, hole-free gloves before turning on the

power.

9. Turn o the power before removing your gloves.

10. Refer to ANSI/ASC Standard Z49.1 (listed on

next page) for specic grounding recommenda-

tions. Do not mistake the work lead for a ground

cable.

ELECTRIC AND MAGNETIC FIELDS

— May be dangerous. Electric cur-

rent owing through any conduc-

tor causes localized Electric and

Magnetic Fields (EMF). Welding and

cutting current creates EMF around welding cables

and welding machines. Therefore:

1. Welders having pacemakers should consult their

physician before welding. EMF may interfere with

some pacemakers.

2. Exposure to EMF may have other health eects which

are unknown.

3. Welders should use the following procedures to

minimize exposure to EMF:

A. Route the electrode and work cables together.

Secure them with tape when possible.

B. Never coil the torch or work cable around your

body.

C. Do not place your body between the torch and

work cables. Route cables on the same side of

your body.

D. Connect the work cable to the workpiece as close

as possible to the area being welded.

E. Keep welding power source and cables as far

away from your body as possible.

FUMES AND GASES -- Fumes and

gases, can cause discomfort or harm,

particularly in conned spaces. Do

not breathe fumes and gases. Shield-

ing gases can cause asphyxiation.

Therefore:

1. Always provide adequate ventilation in the work area

by natural or mechanical means. Do not weld, cut, or

gouge on materials such as galvanized steel, stain-

less steel, copper, zinc, lead, beryllium, or cadmium

unless positive mechanical ventilation is provided.

Do not breathe fumes from these materials.

2. Do not operate near degreasing and spraying opera-

tions. The heat or arc rays can react with chlorinated

hydrocarbon vapors to form phosgene, a highly

toxic gas, and other irritant gases.

3. If you develop momentary eye, nose, or throat ir-

ritation while operating, this is an indication that

ventilation is not adequate. Stop work and take

necessary steps to improve ventilation in the work

area. Do not continue to operate if physical discom-

fort persists.

4. Refer to ANSI/ASC Standard Z49.1 (see listing below)

for specic ventilation recommendations.

7

SECTION 1 SAFETY PRECAUTIONS

5. WARNING: This product, when used for welding

or cutting, produces fumes or gases

which contain chemicals known to

the State of California to cause birth

defects and, in some cases, cancer.

(California Health & Safety Code

§25249.5 et seq.)

CYLINDER HANDLING -- Cylinders,

if mishandled, can rupture and vio-

lently release gas. Sudden rupture

of cylinder, valve, or relief device can

injure or kill. Therefore:

1. Use the proper gas for the process and use the

proper pressure reducing regulator designed to

operate from the compressed gas cylinder. Do not

use adaptors. Maintain hoses and ttings in good

condition. Follow manufacturer's operating instruc-

tions for mounting regulator to a compressed gas

cylinder.

2. Always secure cylinders in an upright position by

chain or strap to suitable hand trucks, undercar-

riages, benches, walls, post, or racks. Never secure

cylinders to work tables or xtures where they may

become part of an electrical circuit.

3. When not in use, keep cylinder valves closed. Have

valve protection cap in place if regulator is not con-

nected. Secure and move cylinders by using suitable

hand trucks. Avoid rough handling of cylinders.

4. Locate cylinders away from heat, sparks, and ames.

Never strike an arc on a cylinder.

5. For additional information, refer to CGA Standard P-1,

"Precautions for Safe Handling of Compressed Gases

in Cylinders", which is available from Compressed

Gas Association, 1235 Jeerson Davis Highway,

Arlington, VA 22202.

EQUIPMENT MAINTENANCE -- Faulty or

improperly maintained equipment can

cause injury or death. Therefore:

1. Always have qualied personnel perform the instal-

lation, troubleshooting, and maintenance work.

Do not perform any electrical work unless you are

qualied to perform such work.

2. Before performing any maintenance work inside a

power source, disconnect the power source from

the incoming electrical power.

3. Maintain cables, grounding wire, connections, power

cord, and power supply in safe working order. Do

not operate any equipment in faulty condition.

4. Do not abuse any equipment or accessories. Keep

equipment away from heat sources such as furnaces,

wet conditions such as water puddles, oil or grease,

corrosive atmospheres and inclement weather.

5. Keep all safety devices and cabinet covers in position

and in good repair.

6. Use equipment only for its intended purpose. Do

not modify it in any manner.

ADDITIONAL SAFETY INFORMATION -- For

more information on safe practices for

electric arc welding and cutting equip-

ment, ask your supplier for a copy of

"Precautions and Safe Practices for Arc

Welding, Cutting and Gouging", Form

52-529.

The following publications, which are available from

the American Welding Society, 550 N.W. LeJuene Road,

Miami, FL 33126, are recommended to you:

1. ANSI/ASC Z49.1 - "Safety in Welding and Cutting"

2. AWS C5.1 - "Recommended Practices for Plasma Arc

Welding"

3. AWS C5.2 - "Recommended Practices for Plasma Arc

Cutting"

4. AWS C5.3 - "Recommended Practices for Air Carbon

Arc Gouging and Cutting"

8

SECTION 1 SAFETY PRECAUTIONS

5. AWS C5.5 - "Recommended Practices for Gas Tung-

sten Arc Welding“

6. AWS C5.6 - "Recommended Practices for Gas Metal

Arc Welding"“

7. AWS SP - "Safe Practices" - Reprint, Welding Hand-

book.

8. ANSI/AWS F4.1, "Recommended Safe Practices for

Welding and Cutting of Containers That Have Held

Hazardous Substances."

MEANING OF SYMBOLS - As used

throughout this manual: Means Atten-

tion! Be Alert! Your safety is involved.

Means immediate hazards which,

if not avoided, will result in im-

mediate, serious personal injury

or loss of life.

Means potential hazards which

could result in personal injury or

loss of life.

Means hazards which could result

in minor personal injury.

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17

SECTION 2 DESCRIPTION

Specications

Rated DCCV or DCCC Output (10 min base)

50% duty cycle (NEMA Class I) ..................................260 amps @ 27 vdc

Output Current Range

Mig (GMAW) ................................................................................. 35-300 amps

Tig (GTAW) .................................................................................... 10-300 amps

Stick (SMAW)................................................................................ 40-300 amps

Open Circuit Voltage

Mig (MGAW)...........................................................................................39.0 vdc

Tig (TGAW).................................................................................................20 vdc

Stick (SMAW).............................................................................................70 vdc

Primary Input Voltage & Current @ 260 amp rated load

208/230 vac, 60 Hz, 1 ph .................................................................57/52 amps

Wire Feed Range ..............................................65-675 ipm (1.6 - 17.3 m/min)

Net Weight ................................................................................250 lbs. (112.5 kg)

Shipping Weight .....................................................................290 lbs. (130.5 kg)

W x L x H ................... 25.3 in. (64 cm) x 39.5 in. (100 cm) x 33.5 in. (85 cm)

Industrial Ready-To-Weld Multi-Process Package MultiMaster® 300

Ordering Information

MultiMaster® 300 cvcc Multi-Process Packages

Each of the following packages are set ready to run .035/.045 diameter

wire. Packages include power source with built-in four roll wire feeder;

factory installed undercarriage & cylinder rack; Gun Master Mig Torch;

Gas regulator/owmeter with hose; Work cable & clamp; Primary input

cable; Mig Welding Handbook; 10# sample of .035 86HP III Wire and 5#

sample Stick Electrodes. See optional accessories.

Packages with 12ft. GM-250 Torch

0558101415 ..................................................MULTMSTR 300 230V NAS 12FT ARG

0558101416 ..................................................MULTMSTR 300 230V NAS 12FT CO2

0558101425 ..................................................MULTMSTR 300 575V NAS 12FT ARG

0558101426 ..................................................MULTMSTR 300 575V NAS 12FT CO2

Packages with 12ft. GM-250 Torch & MT-250SG

0558101418 .....................................................MM 300 230V NAS 12FT MT250-SG

0558101428 .....................................................MM 300 575V NAS 12FT MT250-SG

Packages with 12ft. GM-250 Torch & ST-23A

0558101420 ........................................................... MM 300 230V NAS 12FT ST-23A

0558101430 ........................................................... MM 300 575V NAS 12FT ST-23A

Packages with 15ft. GM-250 Torch

0558101410 ..................................................MULTMSTR 300 230V NAS 15FT ARG

0558101417 ............................................................MULTMSTR 300 230V 15FT CO2

0558101411 ..................................................MULTMSTR 300 575V NAS 15FT ARG

0558101427 ..................................................MULTMSTR 300 575V NAS 15FT CO2

Packages with 15ft. GM-250 Torch & MT-250SG

0558101419 .....................................................MM 300 230V NAS 15FT MT250-SG

0558101429 .....................................................MM 300 575V NAS 15FT MT250-SG

Packages with 15ft. GM-250 Torch & ST-23A

0558101421 ........................................................... MM 300 230V NAS 15FT ST-23A

0558101431 ........................................................... MM 300 575V NAS 15FT ST-23A

Packages with 12 or 15ft. GM-400 Torch

0558101423 .................................................MM300-GM400X12-FT, 230V ARGON

0558101424 .................................................MM300-GM400X15-FT, 230V ARGON

Packages with 15ft. GM-250 Torch & TIG/Stick w/ Remote

0558101412 .......................................................... MM300 230V DLUX MTS W/REM

0558101413 ................................................. MM300 208-575V DLUX MTS W/REM

Packages without Torch

0558101422 ................................................................ MM 300 230V W/OUT TORCH

• Advanced SuperSwitch

TM

technology makes multi-

process welding a breeze. Simplied setup makes it

easy to select Mig, Tig, or Stick

• DC welding output from 15 to 300 amps; rated 260

amps at 50% duty cycle

• Output Pre-Set Capability for Quick Set-Up

• Two Digital Meters for Easy Fine Tuning

• Heavy Duty Four Drive Roll Stand

• Convenient, Large Capacity Built-In Tool Box

• Dual “Easy-On” Cylinder Tray

• Pulse Mig Capability with optional module

18

Specications

Rated DCCV or DCCC Output (10 min base)

50% duty cycle (NEMA Class I) ............................................260 amps @ 27 vdc

Output Current Range

Mig/Fluxcore (GMAW/FCAW) ..........................................................35-300 amps

Tig (GTAW) ................................................................................... 10-300 amps

Stick (SMAW) ...............................................................................40-300 amps

Open Circuit Voltage

Mig/Fluxcore (MGAW/FCAW) .......................................................................39 vdc

Tig (TGAW) ................................................................................................20 vdc

Stick (SMAW) .......................................................................................................70 vdc

Primary Input Voltage & Current @ 260 amp rated load

208/230 vac, 60 Hz, 1 ph...........................................................57/52 amps

Wire Feed Range ..................................................65-675 ipm (1.6 - 17.3 m/min)

Net Weight.....................................................................................250 lbs. (112.5 kg)

Shipping Weight ...........................................................................300 lbs. (xx.x kg)

W x L x H .......................25.3 in. (64 cm) x 39.5 in. (100 cm) x 33.5 in. (85 cm)

Ordering Information

MultiMaster

®

300X cvcc Packages

Each of the following packages are set ready to run .045" diameter

DualShield X Series wire. Packages include power source with built-in

four roll wire feeder with .045-.052-1/16" knurled feed rolls; factory

installed undercarriage & cylinder rack; Gun Master 400 Amp Mig

Torch; Contact Tips for .045", R-33-FM320 - CO2 regulator/owmeter;

6' gas hose; Electrode holder and plug; 15' Work cable & clamp; 10'

Primary input cable; Mig Welding Handbook; 33# spool of .045"

DualShield 710X wire and 5# sample assortment of Stick Electrodes.

See next page for options and accessories.

MultiMaster

®

300X w/15 ft. GM-400 “NAS” torch

208/230 vac, 1 phase 50/50 Hz. ............................................0558007778

230-575 vac, 1 phase 50/60 Hz. .............................................0558007779

If TIG Set with Thumb Control Remote is desired for the above, add one of the

TIG/Stick sets listed on the next page. If you wish to have TIG Set with Foot

Control, order one of the below outts.

MultiMaster

®

300X cvcc Multi-Process Package

MultiMaster

®

300X w/15ft. GunMaster-400 & 25ft. HW-17v2TL

208/230 vac, 1 phase 50/60 Hz ............................................. 0558007780

230-575 vac, 1 phase 50/60 Hz ...............................................0558007781

Comes complete with items listed above plus:

HW-17v-2TL Heliarc Torch, 25 ft. Heliarc Torch Accessory Kit

Remote Control Panel FC-5C Foot Control, 30 ft.

Electrode Cable & Holder, 15 ft. TIG Welding Handbook

R33-FM 580 Flowmeter/Regulator

• Advanced SuperSwitchTM technology makes welding

with DualShield X Series a breeze.

• DC welding output from 15 to 300 amps; rated 260 amps

at 50% duty cycle

• Output pre-set control with two digital meters makes for

quick set-up straight from the DualShield X Series quick

set up card.

• 400 Amp 15ft. gun set up for DualShield X Series wires in

045" and .052" diameters.

• Heavy Duty Four Drive Roll stand with serrated Du-

alShield X drive rolls for .045" and .052" dia.

• Convenient, large capacity built-in tool box

• Dual “Easy-On” cylinder tray

• Can be congured to run from Marathon paks

• Fan on demand

• Pulse Mig Capability with optional module

SECTION 2 DESCRIPTION

Industrial Ready-To-Weld Multi-Process Package MultiMaster® 300X

19

Digital Meter

Volts, Amps, and Wire feed speed

Voltage/Current

Control

Process Selector

Voltage Preset

Status Indicators

Wire Feed Speed

Control

Pulse Module Option

Pulse Mig Welding of Carbon Steel, Stainless

Steel and Aluminum

Remote Control

Option

“Spool-on-Gun”

Option

SECTION 2 DESCRIPTION

Optional Equipment

EURO CC Retrot Kit ......................................................................... 0558001082

NAS to Euro Adapter ..........................................................................0558002622

Primary Extension Cord (25 ft.) 50 amp .................................................37833

TIG Welding Handbook ..............................................................................781F29

MIG Welding Handbook ............................................................................ 791F18

Gas Meter (measures gas ow at the gun) ..............................................19043

Marathon Pak Inlet Adapter (ts QCA 899F50) ......................0558002354

Refer to Marathon Pak brochures for Cap and Conduit selections

50 mm Connectors - quick-acting twist lock connectors for

attaching output power cables or torches to power source:

Male for 1/0 to 4/0 cable ................................................................ 13792513

Female for 1/0 to 4/0 cable ........................................................... 13735631

Male for #2 AWG to 1/0 cable ......................................................13733936

Female for #2 AWG to 1/0 cable ..................................................13735632

Quick connector with 1/2 in. threaded stud .......................... 13735501

Tee connector - 1 male, 2 female ...............................................13792804

Tig/Stick Sets

Includes 15 ft. Electrode Holder, 12.5 ft. or 25 ft. HW-17V-2TL

Torch, Torch Accessory Kit, Remote Control Module, TC-2B

Thumb Control and TIG Handbook.

TIG/Stick Set 12.5 ft. .................................................................0558004449

TIG/Stick Set 25 ft. ..................................................................... 0558004450

Pre/Post Flow/Spot/Burnback module .................................... 0558002889

Inductance Control Module .......................................................... 0558002888

Remote Control Module ................................................................. 0558002605

FC-5C Foot Control - 30 ft. (9.1 m) cable ................................... 0558004234

Provides remote current control and connector (on/o) control and

requires

Remote Control Module ..............................................

0558002605

TC-2B Thumb Control - 25 ft. ......................................................................33839

Provides remote current control and connector (on/o) control and

requires

Remote Control Module ..............................................

0558002605

Spool Gun Module ............................................................................. 0558002606

MT-250SG Spool Gun ....................................................................................36779

Requires Spool Gun module .................................................. 0558002606

ST-23A Spool Gun ........................................................................................... 19164

Requires Adapter 37301 and Spool Gun module .............. 0558002606

Pulse Module Option ......................................................................... 0558002604

HW-17V-2TL (w/valve) Heliarc

®

Tig Torch

60 deg. 12.5 ft.

...................35857

HW-17V-2TL (w/valve) Heliarc

®

Tig Torch

60 deg. 25 ft.

......................35856

Tig weld without disconnecting the Mig torch.

HW-17 Torch Accessory Kit ......................................................................999126

Work Cable & Clamp (15 ft.) .........................................................................35881

Electrode Holder Assembly - 175 amp (15 ft.) .........................0558001791

(Includes holder, cable and quick connector)

Electrode Holder Assembly - 300 Amp (15 ft.) ................................... 21226

(Includes holder, cable and quick connector)

20

2.1 GENERAL

This manual has been prepared for experienced welders. Do

NOT permit untrained persons to install, operate or maintain

this equipment. Do NOT attempt to install or operate this

equipment until you have read and fully understand these

instructions.

This manual is intended for use in familiarizing person nel with

the design and operation of this equipment. All information

presented here should be read careful ly before installing and

using this equipment.

2.2 RECEIVING-HANDLING

Upon receipt of this equipment, clean all packing material

from around the unit and immediately inspect for any dam-

age that may have occurred during shipment. Any claims

for loss or damage occurring in transit must be led with

the carrier. The carrier will furnish a copy of the bill of lading

and the freight bill on request, if the need to le a damage

claim arises.

When requesting information regarding this equipment,

make sure that you include product name, part num ber, and

serial number.

2.3 SAFETY

The safety section at the front of this manual should be read

completely before attempting to install and operate this

equipment. Both equipment and person nel hazards are

reduced if proper safety precautions are taken. If you are

unsure of yourself in any situa tion, ask your supervisor or

other experi enced person nel for help.

2.4.1 POWER SOURCE

The power source is a secondary chopper DC output designed

for single phase primary connec tions. An output controlled

fan provides proper cooling during normal welding opera-

tions and shuts o four minutes after welding stops. The fan

will automatically re-start when welding resumes and proper

machine temperatures will be maintained.

2.4.2 WIRE FEEDER

The four (4) roll drive wire feeder is built into the power source

cabinet, housed separately from the welding machine electri-

cal components. Cooling air is not drawn through the wire

feeder compartment or electronic controls reducing exposure

to dirt and dust which improves product performance and

reliability.

The wire feeder pushes wire at speeds from 65 to 675 ipm

(inches per minute).

2.4.3 CONTROLS

The Multimaster 300/300X can be used to weld solid and ux

cored wires. The operator selects the process desired on a

three position switch located on the front panel. A detailed

description of the power source controls is included in Section

4 (Operation) of this manual.

2.4.4 BUILT-IN TOOL BOX

The Multimaster 300/300X is designed with a lockable storage

space on the left side of the machine for welding accessories

such as contact tips, gas nozzles, small grinder, spare parts,

welding hood and protective clothing. (Figure 1B)

2.4.5 GUN MASTER 250 MIG GUN

This air-cooled welding gun is supplied complete and ready

to weld .045 / .052 in. Fluxcored wire. Other wire sizes can

be used. Refer to Table 6 in Section 6, for other wire size and

alloy accessories.

2.4.6 RUNNING GEAR

The Multimaster 300/300X is equipped with running gear with

swivel front wheels and a dual gas cylinder support.

Means immediate hazards which, if not

avoided, will result in immediate, serious

personal injury or loss of life.

Means potential hazards which could result

in personal injury or loss of life.

Means hazards which could result in minor

personal injury.

2.4 DESCRIPTION

The Multimaster 300/300X is a DC welding system designed

for Mig (GMAW), Tig (GTAW) or Stick (SMAW) welding. In the

Mig mode this unit is capable of operating with short arc or

spray arc transfer and handles both solid wires and tubular

cored wires. This unit is suitable for carbon steel, stainless steel,

aluminum and many other alloys. It provides a power source

with built in wire feeder and undercarriage with provisions

for two gas cylinders.

SECTION 2 DESCRIPTION

21

Gun Master 400 Mig Gun

15’ Work Cable

and Clamp

Simple To Use Weld

Controls

Figure 1A - Components

Large, Easy To Read

Digital Displays for Wire

Speed, Amps and Volts

Simple and quick

polarity change-over

SECTION 2 DESCRIPTION

22

Tool Box with Small

Parts Tray

Primary Input Voltage

Reconnect Panel

(under this cover)

4 Roll

Drive Stand

Adaptable

Spindle Assembly

Inductance Burnback

Preow/postow

Spot (Options)

Figure 1B - Components

SECTION 2 DESCRIPTION

23

3.0 INSTALLATION

3.1 LOCATION

Several factors should be considered when selecting an in-

stallation site. Adequate ventilation is necessary to provide

cooling, and the amount of dirt and dust to which the machine

is exposed should be minimized. There should be at least 18

inches of unrestricted space between the machine’s side and

rear panels and the nearest obstruction to provide freedom

of air movement through the power source.

3.2 HANDLE ASSEMBLY INSTALLATION

The Multimaster 300/300X is factory assembled except for

the front handle assembly which is mounted to the machine

upside down for shipping purposes. The handle assembly

consists of two brackets and a cross bar. To install the handle

in its proper position, do the following:

A. Remove the two sheet metal screws from the brackets on

each side of the front handle assembly. See Figure 3A.

B. Remove front handle assembly and reverse sides with the

mounting brackets. This will put the handle assembly in

the proper orientation. Reattach brackets using the sheet

metal screws removed in Step A. See Figure 3B.

Figure 2 - Dimensions

Sheet metal Screws

The installation site should permit easy removal of the ma-

chine’s outer enclosure for maintenance. Installing or placing

any type of ltering device will restrict the volume of intake

air, thus subjecting the internal components to overheating.

Warranty is void if any type of ltering device is used.

Figure 3B - Handle Assembly Installation

SECTION 3 INSTALLATION

Sheet metal

Screws

Figure 3A - Handle Assembly Removal

Handle Bracket

20”

32”

42”

24

3.3 ELECTRICAL INPUT CONNECTIONS

In order to provide a safe and convenient means to complete-

ly remove all electrical power from the machine, it is highly

recommended that a line disconnect switch be installed in

the input circuit of the machine.

Before making electrical input connections to the weld-

ing machine, unplug the unit or use “Machinery Lockout

Procedures”. If the connections are to be made from a line

disconnect switch, the switch should be padlocked in the

o position. If the connection is to be made from a fuse-

box, remove the fuses and padlock the cover closed.

3.3.1 INPUT ELECTRICAL REQUIREMENTS

The primary input voltage requirements are shown on the

power source nameplate. The power source is designed

to be operated from 208/230 vac single phase 50/60 Hz or

230/460/575 vac single phase 50/60 Hz.

3.3.2 INPUT PLUG

The input power cord is provided with an attachment plug.

The plug will mate with a 250 volt, 50 Amp receptacle conform-

ing to NEMA 6-50R congura tion (208/230 vac model only).

The receptacle should be wired to a separately fused discon-

nect or circuit breaker by an electrician. This disconnect

or breaker can be wired to a single phase system or two

conductors of a three phase system. A third conductor for

grounding must be connected between the disconnect and

the receptacle.

The termi nal labeled GRD is connected to the power source

chassis and is for ground purposes only. This must be

connected to a good electrical ground. Do not connect

a conductor from the terminal labeled GRD to any one of

the L1, L2 terminals as this will result in an electrically hot

machine chassis.

3.4 VOLTAGE CHANGEOVER (Figure 4)

The voltage changeover terminal board is located in the tool

compartment on the left side of the machine. As shipped from

the factory, the Multimaster 300/300X is congured for the

highest connectable voltage. If using the other input voltages,

the links on the terminal board (TB) inside the unit must be

repositioned for the appropriate input voltage. See gures

4A - 4E for 60Hz input voltage congurations. To gain access

to the terminal board, open the access panel on the left side.

To change voltages, perform the following:

A. Remove the left screw ONLY and swing plexiglass door

upward.

B. Adjust the copper bar links to the primary voltage being

used.

C. Swing clear panel down and secure with screw.

Typical Installation -

User Supplied Power

Disconnect Box,

Receptacle and Plug

SECTION 3 INSTALLATION

25

Figure 4 - Voltage Changeover Terminal Board

208/230 Version Shown Installed

Clear Panel Hinges on

corner screw

Remove this screw only

This screw must remain

in place

DO NOT REMOVE

Figure 4A -

Input Terminal Board

230/460/575 Vac Model

230 Vac Conguration

Figure 4B -

Input Terminal Board

230/460/575 Vac Model

460 Vac Conguration

Figure 4C -

Input Terminal Board

230/460/575 Vac Model

575 Vac Conguration

Figure 4D -

Input Terminal Board

208/230 Vac Model

208 Vac Conguration

Figure 4E -

Input Terminal Board

208/230 Vac Model

230 Vac Conguration

3.5 SECONDARY OUTPUT CONNEC TIONS (Figure 5)

The Multimaster 300/300X Welding System is completely self-

contained so that the front panel gun/torch connections are

internally connected to the welding polarity (DCEP or DCEN)

via the secondary output terminals depending on the welding

process being used.

Figure 5 - Polarity Set-up

SECTION 3 INSTALLATION

26

3.6 “NAS” TORCH CONNECTIONS (Figure 6)

To install a Gun Master Mig Gun 400, remove the locking

knob on the side of the NAS connector and insert the male

power pin of the gun. Be sure the o-rings are securely seated

by pushing inward on the power pin while tightening the

locking knob.

Install a spool of welding wire on the spindle as follows:

A. Remove the locking pin from the spindle (Figure 8).

B. Place wire spool on the spindle to rotate clockwise as

wire is unwound; spindle brake pin must engage hole in

spool.

C. Replace the locking pin into the spindle hole closest to

the spool.

3.7.3 THREADING WELDING WIRE

A. Turn o power switch.

B. Release pressure drive roll assembly. Check that proper

wire diameter grooves are in the inner position.

3.7 WIRE FEEDER MECHANISM

3.7.1 DRIVE ROLLS (Figure 7 and 9)

The drive roll has two grooves:

for the MultiMaster 300 - the small groove feeds .045 in.

diameter wire, the large groove feeds .052 in. wire.

for the MultiMaster 300X - the small groove feeds .035 in.

diameter wire, the large groove feeds .045 in. wire.

The groove nearest the gear motor feeds the wire. If the

required groove is not correctly positioned, perform the fol-

lowing:

A. Release the pressure drive roll lever.

B. Remove the two (2) screws holding the drive rolls to the

gears.

C. Reverse the drive roll on the drive roll shaft.

D. Replace the screws and tighten.

E. Secure the pressure drive roll assembly.

Figure 6 - NAS Gun Connector

Locking Knob

Feed Roll Release Screws

Figure 7 - Wire Feeder Mechanism

3.7.2 WELDING WIRE SPOOL INSTALLATION

As with any work area, make sure safety glasses with side

shields are worn when handling or changing wire or clip-

ping wire o at the spool or at the end of the torch. Hold

onto the wire coming o the spool with one hand before

clipping. Serious eye injury can result due to the resilience

of the wire which can quickly unravel, or a cut wire end

which may shoot across the room.

Figure 8 - Spindle Assembly

Locking Pin

Spool Spindle

SECTION 3 INSTALLATION

27

Pressure Roll Assembly

Pressure Release

Lever

Threading the wire

through the inlet

guide

Figure 9 - Threading the Wire

Before threading welding wire, make sure chisel point and

burrs have been removed from wire end to prevent wire

from jamming in gun or liner.

C. Feed the wire from the spool through the inlet guide,

across the drive roll grooves and center guide into the

outlet guide and NAS connection tube.

SECTION 3 INSTALLATION

Make sure that the proper “outlet guide tube” is inserted into

the front-panel gun tting for the size and type of wire being

used, see Table 6 in the Replacement Parts section for wire

feed accessories.

To ensure proper wire feeding, it is important that the wire be

kept clean and that the drive rolls be periodi cally cleaned of

any chips or scale that might be carried into the gun liner.

D. Lower pressure roll assembly and secure. Turn the power

“on” and feed wire through to gun tip using the gun trig-

ger to start wire feeding.

When the power switch is on, and gun trigger is de-

pressed, the electrode wire becomes electrically hot, and

the wire drive rolls will rotate.

3.7.4 SPOOL BRAKE DRAG ADJUSTMENT

Spool brake disc friction should provide enough drag to keep

the wire spool from spinning freely after wire feed stops. If

adjustment is required, turn the adjusting screw inside the

spindle housing clockwise to increase drag or counterclock-

wise to decrease it. Drag should be just enough to limit

wire overrun.

3.8 CONNECTION OF SHIELDING GAS SUPPLY

3.8.1 R-33-FM-320 Flowmeter / Regulator

The R-33-FM-320 Flowmeter / Regulator is an adjustable

regulator designed for use with CO

2

gas service. Table 2

provides the recommended ow ranges for the R-33-FM-320

Flowmeter / Regulator.

CO

2

20-50 cfh

Table 2 - Typical Flow Rates

A. With the cylinder cap in place, CAREFULLY slide the cylinder

of gas onto the Multimaster 300/300X cylinder rack.

B. Secure the cylinder to the unit using the chain provid ed.

C. Unscrew the cylinder cap.

Do not clamp regulator cap in a vise or grip it with a pair

of pliers. Distortion of cap can jam the internal parts and

cause excessively high delivery pressure as well as weaken

the threaded joint to the regulator body. This may cause

the cap to y o and possibly injure personnel in area.

D. Open the cylinder valve slightly, for an instant, to blow

out any dust or dirt that may have collected in the valve

outlet. BE SURE to keep your face away from the valve

outlet to protect your eyes.

E. Attach the regulator to the cylinder valve. Align the regula-

tor so that the owmeter is vertical and then tighten the

connection nut with a 1-1/8 in. open end or adjustable

wrench. To prevent damaging the O-ring seals and plastic

tube, do not use the owmeter tube as a ‘handle’ when

attaching the regulator.

F. Close the ow control valve on the owmeter.

G. Attach the gas hose from the rear of the Multimaster

300/300X to the regulator outlet connection.

28

Figure 10 - R-33 Regulator

Cylinder Valve

Connection

Nut

Flow Tube

Control Valve

Pressure

Gauge

SECTION 3 INSTALLATION

Never stand directly in front of or behind the regulator

when opening the cylinder valve. Always stand to one

side.

H. Open the cylinder valve SLOWLY a fraction of a turn. This

will prevent damage to the gauge and critical components

in the regulator. When the gauge needle stops moving,

then open the cylinder valve fully.

I. Using a leak test solution, such as P/N 998771 (8 oz. ctr)

or soapy water, test for leakage around the cylinder valve

stem, the regulator inlet connection, and the hose con-

nections at the regulator. Correct any leaks before starting

work.

3.8.1 TO REGULATE FLOW

Flow is controlled by adjusting the owmeter valve until de-

sired ow is indicated by the ball oat in the owmeter tube.

Always take the reading across the TOP of the ball.

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ESAB Multimaster 300/300X Mig/Tig/Stick Welding Package User manual

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